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(8 results)



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    • Derry Gold Dredge, near Leadville, Colo. Mt. Massive in background at right

    • Men and women pose on the Derry Dredge, Empire Gold Dredging Company's hydraulic placer bucket-line vessel, near Leadville, Lake County, Colorado. Sign reads: "Derry Dredge - Built by New York Engineering Co."
    • Empire Gold Dredging Company--Equipment & supplies--1910-1930.; Dredges--Colorado--Lake County--1910-1930.; Lake County (Colo.)--1910-1930.; Gold mining--Colorado--Lake County--1910-1930.; Hydraulic mining--Colorado--Lake County--1910-1930.; Mining...
    • between 1915 and 1926
    • Derry Gold Dredge, Twin Peaks in background, near Leadville, Colo.

    • View of the Derry Dredge, Empire Gold Dredging Company's hydraulic placer bucket-line vessel, near Leadville, Lake County, Colorado. Sign reads: "Derry Dredge - Built by New York Engineering Co."
    • Empire Gold Dredging Company--Equipment & supplies--1910-1920.; Dredges--Colorado--Lake County--1910-1930.; Lake County (Colo.)--1910-1930.; Gold mining--Colorado--Lake County--1910-1930.; Hydraulic mining--Colorado--Lake County--1910-1930.; Mining...
    • between 1915 and 1926
    • Assaying precious metals in Leadville, Colo., $3,723 in two gold bricks on scale pan

    • Interior view of a mine assay laboratory in Leadville, Colorado; shows furnaces, a cabinet balance-scale, ore samples, and a man working with tongs.
    • Assaying--Colorado--Leadville--1860-1870.; Leadville (Colo.)--1860-1870.; Gold--Colorado--Leadville--1860-1870.; Mining--Colorado--Leadville--1860-1870.
    • [between 1860 and 1870?]
    • Plant of Western Zinc Oxide Smelting Co. Leadville, Colo.

    • View of the Western Zinc Oxide Smelting Company plant in Leadville, Lake County, Colorado shows buildings, railroad tracks with freight car.
    • Leadville (Colo.)--1910-1920.; Buildings--Colorado--Leadville--1910-1920.; Mine railroads--Colorado--Leadville--1910-1920.; Mining--Colorado--Leadville--1910-1920.; Smelters--Colorado--Leadville--1910-1920.
    • [between 1910 and 1920?]
    • Famous Newhouse Tunnel and Argo Mill, near Idaho Springs, Colo.

    • View of the Newhouse Tunnel and Argo Mill near Idaho Springs (Clear Creek County), Colorado. Boxcars are on the tracks of the Colorado and Southern (C&S) tracks near Clear Creek.
    • Argo Mill (Clear Creek County, Colo.)--1890-1900.; Newhouse Tunnel (Clear Creek County, Colo.)--1890-1900.; Mills--Colorado--Idaho Springs--1890-1900.; Mining--Colorado--Idaho Springs--1890-1900.
    • [between 1910 and 1920]
    • Great Falls of Yellowstone

    • View of the Great Falls (Upper Falls) of the Yellowstone River, Yellowstone National Park, Wyoming. Shows balsalt cliffs, rock formations, pine forests and talus slopes to the river edge.
    • Upper Falls of the Yellowstone River--1870-1880.; Yellowstone National Park--1870-1880.; Yellowstone River--1870-1880.; Expeditions & surveys--Yellowstone National Park--1870-1880.; Rivers--Yellowstone National Park--1870-1880.;...
    • [1871.]
    • Mystic Lake, near Fort Ellis

    • View of Mystic Lake near Fort Ellis (Gallatin County), Montana. Shows trees on the shoreline, brush and forest; mountains are in the distance.
    • Gallatin County (Mont.)--1870-1880.; Mystic Lake (Gallatin County, Mont.)--1870-1880.; Expeditions & surveys--Montana--Gallatin County--1870-1880.; Lakes & ponds--Montana--Gallatin County--1870-1880.; Geological and Geographical Survey of the...
    • [1871.]
    • Extinct Volcano on Henry's Fork of Snake River

    • View of a mesa near Henrys Fork a river in either Madison or Fremont County, Idaho. Shows a wide creek, brush and the remnants extinct volcanic cone.
    • Henrys Fork (Idaho)--1870-1880.; Expeditions & surveys--Idaho--1870-1880.; Mesas--Idaho--1870-1880.; Streams--Idaho--1870-1880.; Geological and Geographical Survey of the Territories (U.S.)
    • [1871.]

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